Besides sticking with the Snapdragon 801, Sony has apparently decided to keep the 1080 x 1920 resolution on the screen, instead of opting for a 1440 x 2560 QHD display. Perhaps that also will keep until the Xperia Z4 is released early next year.
The Sony Xperia Z3 could be unveiled in September, around the time of the IFA 2014 show in Berlin. The current Sony flagship, the Sony Xperia Z2, was introduced during the MWC in February. The Sony Xperia Z3 has slightly more rounded corners, a more easily seen front microphone, and narrower bezels. You can check it out by clicking on the slideshow below.
Thanks for the tip, Stitch!
source: VRZone (translated)